%0 Journal Article
%T Magnetic properties of TbMn6Sn6-xGax (x=0.0－1.2) compounds
%A 赵鹏
%A 张绍英
%A 成昭华
%A 沈保根
%J 中国物理 B
%D 2002
%I 
%X Effects of Ga substitution for Sn on the structure and magnetic properties of TbMn6Sn6-xGax (x=0.0－1.2) compounds have been investigated by means of x-ray diffraction, magnetization measurement and 119Sn M?ssbauer spectroscopy. The substitution of Ga for Sn results in a decrease in lattice constants and unit-cell volumes. The magnetic ordering temperature decreases monotonically with increasing Ga content from 423 K for x=0.0 to 390 K for x=1.2. At room temperature, the easy magnetization direction changes from the c-axis to the ab-plane. This variation implies that the substitution of Ga for Sn leads to a decrease in the c-axis anisotropy of the Tb sublattice. An increase in the non-magnetic Ga concentration results in a monotonic decrease of the spontaneous magnetization Ms at room temperature. Since there are three non-equivalent Sn sites, 2c (0.33, 0.67,0), 2d (0.33, 0.67,0.5) and 2e (0,0,0.34) in the TbMn6Sn6-xGax compounds, the 119Sn M?ssbauer spectra of the TbMn6Sn6 and TbMn6Sn5.4Ga0.6 compounds can be fitted by three sextets. The hyperfine fields (HFs) decrease in the order of HF(2d)>HF(2e)>HF(2c), which is in agreement with the magnetic structure.
%K TbMn6Sn6－2Gax化合物
%K 磁特性
%K 磁结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=2DDC3FCF3F2124C84E6CAD2A77419627&yid=C3ACC247184A22C1&vid=708DD6B15D2464E8&iid=9CF7A0430CBB2DFD&sid=2F26E27A20AEB31F&eid=4986C0B14AED27B4&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=0